JP5263917B2 - child seat - Google Patents

Abstract

The invention provides a child-seat which changes the incline of the seat and has high stability of the seat when sitting. The child-seat (1) is provided with an angle adjusting part (11) arranged on a seat (50) in the state that a seat part (3) is arranged on a seat surface (50a) of the seat (50) on the vehicle and a back (4)is contacted with a backrest part (50b) and mounted on the seat part (3). The angle adjusting part (11) has a contact surface (11a) extending along the forward and backward direction and the right and left direction and being contacted with the contact surface (11a) of the seat surface (50a) and is changed to a mounting position of the seat part (3).

Description

  The present invention relates to a child seat that can be installed on a seat of a vehicle to seat a young person.

  Since a seat provided in a vehicle such as an automobile is often designed for each vehicle type, the inclination of the seat surface with respect to a horizontal plane differs depending on the vehicle type. Therefore, when the child seat is installed in the vehicle seat, the inclination of the seat portion of the child seat changes depending on the inclination of the seating surface of the seat. Therefore, in order to alleviate the influence of the inclination of the seat surface of the seat provided in the vehicle, an angle adjusting leg portion that can be projected and retracted from the lower surface of the front end portion of the seat portion is provided, and the seat portion is projected and retracted. There is known a child seat that can adjust the inclination of (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-291799

  When such a leg portion is used, the contact area between the seat surface of the seat and the leg portion is small, so that the burden on the leg portion increases. Therefore, it is necessary to increase the strength of the legs in order to stably install the child seat on the seat. As a result, there is a possibility that an increase in weight or cost may be caused by measures such as thickening the support shaft that supports the leg portion or selecting a material having a high rigidity as the material of the leg portion.

  Therefore, an object of the present invention is to provide a child seat that can change the inclination of the seat portion and has high stability when the seat is installed.

  Hereinafter, the child seat of the present invention will be described. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.

The present invention comprises a seat part (3) and a back part (4), wherein the seat part is located on a seating surface (100a) of a seat (100) provided in a vehicle and the seat back (100b). In the child seat (1) that can be installed on the seat in a state in which the back portion is in contact, the child seat (1) has a contact surface (11a) that extends in the front-rear direction and the left-right direction of the seat portion and contacts the seat surface , the angle is attached to the seat portion in a state in which the mounting position can be changed with respect to the longitudinal direction, and the height in the vertical direction toward the rear of the seat portion is configured so as to gradually lower the previous SL seat an adjustment member (11), at different positions of said seat portion about said longitudinal direction, movement restriction mechanism which can restrict the movement of the angle adjustment member about the longitudinal direction and the lateral direction (12) A lock mechanism (13) that can maintain a state in which the movement of the angle adjusting member is restricted by the movement restricting mechanism, and the movement restricting mechanism from the opposite side of the contact surface of the angle adjusting member. A projecting portion (14) extending upward, a plurality of movement restricting portions (15A, 15B) provided at different positions of the seat portion in the front-rear direction and fitted with the projecting portions; and provided in the seat portion; and A guide portion (15C) that extends so as to connect two adjacent movement restriction portions among the plurality of movement restriction portions, and guides the protruding portion that is separated from one movement restriction portion to the other movement restriction portion. The above-described problems are solved.

  According to this child seat, since the position of the fulcrum of the seat portion is changed by changing the attachment position of the angle adjusting member with respect to the front-rear direction of the seat portion, the inclination of the seat portion can be adjusted. Since the angle adjusting member has a contact surface extending in the front-rear direction and the left-right direction of the seat portion, the contact area with the seat surface of the vehicle seat increases. Therefore, the child seat can be stably installed on the vehicle seat without applying an excessive burden on the angle adjusting member.

This child seat, the angle adjusting member be configured so that the height in the vertical direction toward the rear of the seat portion is gradually reduced, the angular adjustment member acts like a wedge, the movement of the angle adjustment member The change in the inclination of the sheet portion with respect to can be made larger than when the height is uniform.

Further, when the angle adjustment member is attached to the seat portion, the movement of the angle adjustment member in the front-rear direction and the left-right direction of the seat portion is restricted by the movement restriction mechanism, and the restriction state is held by the lock mechanism Therefore, the stability of the child seat at the time of seat installation is improved.

Further, by changing the movement restricting portion fitting the collision detecting section, it is possible to hold the angular adjustment member in a state where the regulating movement to a different location. Since the movement restriction is realized with a simple structure in which the protrusion and the movement restricting portion are fitted, it is easy to integrally form the protrusion and the angle adjusting member, or to integrally form the movement restricting portion and the seat portion. As a result, the number of parts can be reduced.

Moreover, it extends so as to connect between the two movement restricting portion that fits Ri next, is provided with the guide portion capable of guiding a collision detecting portion that deviates from the first movement restricting portion to the other movement restricting portion, the angular adjustment When changing the attachment position of a member, the movement of the protrusion part from one movement control part to the next movement control part becomes smooth . Thereby , the attachment position of an angle adjustment member can be changed rapidly.

  In addition, the projecting portion is formed in a column shape having a non-circular cross section, and each of the plurality of movement restricting portions has an internal space having a cross section corresponding to the cross section of the projecting portion. You may do it. In this case, there is an advantage that the rotation of the angle adjusting member around the center line extending in the protruding direction can be prevented even by a single protruding portion by fitting the protruding portion into the movement restricting portion.

  The locking mechanism includes a lock plate portion (16) provided in the seat portion and formed with a through long hole (16a) extending in the front-rear direction and penetrating, and the contact surface of the angle adjusting member. The edge of the through long hole is inserted into the through long hole so as to extend upward from the opposite side and move in the front-rear direction, and the movement of the angle adjusting member is restricted by the movement restricting mechanism. And a lock insertion part (17) formed with a protrusion (18) that meshes with the lock plate part. According to this aspect, it is possible to maintain the movement regulation state of the angle adjusting member simply by inserting the lock insertion portion into the through-hole formed in the lock plate portion, and a complicated mechanism is not required, so the number of parts can be easily reduced. can do.

  Further, when the restriction by the movement restricting mechanism is released, a retaining means (19) that can prevent the angle adjusting member from moving beyond an allowable limit in a direction away from the seat portion may be further provided. . In this case, since the angle adjusting member does not move beyond the allowable limit in the direction away from the seat portion, it is possible to prevent the angle adjusting member from falling off when changing the mounting position of the angle adjusting member.

  As described above, according to the child seat of the present invention, the angle adjusting member capable of changing the inclination of the seat portion has the contact surface extending in the front-rear direction and the left-right direction of the seat portion, and is relative to the seat surface of the vehicle seat. Since the contact area increases, the child seat can be stably installed on the vehicle seat without imposing an excessive burden on the angle adjusting member.

  1 is a perspective view showing a child seat according to one embodiment of the present invention, FIG. 2 is a side view of the child seat of FIG. 1, and FIG. 3 is a side view showing a state in which the posture of the child seat of FIG. The child seat 1 includes a seat body 2 having a seat portion 3 and a back portion 4 connected to the rear end of the seat portion 3. The seat body 2 is covered with a cloth seat cover in which a cushion material is disposed at a suitable position on the inner surface, but the figure shows a state in which the seat cover is removed. As shown by an imaginary line in FIG. 2, the child seat 1 is seated in a state where the seat portion 3 is located on the seating surface 100 a of the seat 100 of the automobile as a vehicle and the back portion 4 is in contact with the backrest 100 b of the seat 100. 100 so that it can be installed in 100. The seat portion 3 and the back portion 4 are integrally formed. The seat portion 3 is a part where an infant or a young person sits as a seated person, and side supports 3a protruding in the vertical direction are integrally provided on both sides in the horizontal direction. As shown in FIG. 1, the back portion 4 includes a backrest 5 that supports the back of the seated person and a headrest 6 that continues to the top of the backrest 5. The backrest 5 and the headrest 6 are integrally provided with side supports 5a and 6a for supporting a seated person's trunk or head from the side.

  The child seat 1 includes an angle adjusting device 10 for changing the inclination of the seat portion 3. The angle adjusting device 10 includes an angle adjusting member 11 having a contact surface 11 a that is attached to the lower surface side of the seat portion 3 and contacts the seating surface 100 a of the seat 100. The contact surface 11a is formed in a planar shape so as to extend in the front-rear direction and the left-right direction of the seat portion 3. In particular, with respect to the left-right direction of the seat portion 3, the contact portion 11a extends over substantially the entire length of the seat portion 3 in the left-right direction (see FIG. 6 and the like). The angle adjusting member 11 is integrally molded with a plastic so that the height in the vertical direction gradually decreases toward the rear of the seat portion 3. As shown in FIGS. 2 and 3, the angle adjusting member 11 can change its attachment position with respect to the front-rear direction of the seat portion 3. The illustrated angle adjusting device 10 changes the mounting position of the angle adjusting member 11 in two stages, so that the standing position when the angle adjusting member 11 is positioned forward (see FIG. 2) and the angle adjusting member 12 are The seat portion 3 is configured so that the inclination of the seat portion 3 can be changed between a sleeping position (see FIG. 3) that is located rearward and the front of the seat portion 3 is tilted upward from the standing position.

  Next, details of the angle adjusting device 10 will be described with reference to FIGS. 4 is an enlarged perspective view showing details of the angle adjusting member 11 removed from the seat portion 3, FIG. 5 is an enlarged sectional view taken along the line V-V in FIG. 1, and FIG. 6 is a line VI-VI in FIG. FIG. 7 is an enlarged perspective view showing a part of the seat portion 3 as viewed from above. As shown in these drawings, the angle adjusting device 10 can restrict the movement of the angle adjusting member 11 at different positions in the front-rear direction of the seat portion 3 in order to restrict the movement of the angle adjusting member 11 and to maintain the restriction. It further includes a pair of left and right movement restriction mechanisms 12 and a pair of left and right lock mechanisms 13 that can hold the movement restriction to the angle adjusting member 11 by the movement restriction mechanism 12. Since the movement restriction mechanism 12 and the lock mechanism 13 provided on the left and right have the same configuration, the following description will be made without distinguishing between the left and right.

  As shown in FIGS. 4 to 6, the movement restricting mechanism 12 is provided integrally with the angle adjusting member 11 and extends upward from the opposite side of the contact surface 11 a, and the front and rear of the seat portion 3. Two movement restricting chambers 15A and 15B serving as movement restricting portions that are provided integrally with the seat portion 3 at different positions with respect to the direction to form a space in which the columnar portion 14 can be fitted, and two movement restricting chambers 15A and 15B. A guide path 15C is provided as a guide portion that extends in the front-rear direction so as to connect the two and connects them to each other and can guide in the front-rear direction while sliding the columnar portion 14.

  The columnar portion 14 is configured in a square columnar shape, and each of the movement restriction chambers 15 </ b> A and 15 </ b> B also has an internal space having a square cross section corresponding to the cross section of the columnar portion 14. For this reason, when the columnar part 14 is fitted into the movement restricting chambers 15A and 15B, the movement of the angle adjusting member 11 in the front-rear direction and the left-right direction of the seat part 3 is restricted and the rotation of the angle adjusting member 11 is also restricted. The The gap formed between the columnar part 14 and the movement restricting chambers 15A and 15B is restricted in the movement of the columnar part 14 beyond the allowable limit in the front-rear direction and the left-right direction, and is columnar with respect to the movement restricting chambers 15A and 15B. The size is set so that the portion 14 can be smoothly inserted and removed.

  When the columnar portion 14 is fitted in the forward movement restricting chamber 15A and the movement thereof is restricted, the mounting position of the angle adjusting member 11 is located closer to the front of the seat portion 3, so the child seat 1 is in the standing position shown in FIG. Can be set. On the other hand, when the columnar portion 14 is fitted into the rear movement restricting chamber 15B and the movement thereof is restricted, the attachment position of the angle adjusting member 11 is positioned rearward of the seat portion 3, so that the child seat 1 is positioned as shown in FIG. Can be set to the position state.

  As shown in FIGS. 4, 6, and 7, the lock mechanism 13 includes a lock plate portion 16 provided on the lower surface of the seat portion 3 in order to maintain the movement restriction state of the angle adjustment member 11 by the movement restriction mechanism 12. The lock adjusting portion 17 is provided integrally with the angle adjusting member 11 and extends upward from the opposite side of the contact surface 11a. The lock plate portion 16 is formed with a through long hole 16 a extending in the front-rear direction of the seat portion 3 and penetrating the lock plate portion 16. The longitudinal dimension of the through-hole 16a is set to be larger than the amount of movement of the angle adjusting member 11 in the front-rear direction.

  The lock insertion portion 17 has a size that can be inserted into the through long hole 16a of the lock plate portion 16, and is configured in a hollow shape. In addition, the lock insertion portion 17 has a protrusion 18 that gets over the edge of the through-hole 16a and engages with the lock plate portion 16 when the columnar portion 14 of the angle adjusting member 11 is fitted into each movement restriction chamber 15A, 15B. Yes. The protrusions 18 are integrally provided one by one with respect to both side surfaces of the lock insertion portion 17 and extend in the front-rear direction. In order to facilitate elastic deformation when the protrusion 18 gets over the edge of the through-hole 16a, the lock insertion part 17 penetrates the outer wall of the lock insertion part 17 while leaving a part above the protrusion 18 and the protrusion 18 A through groove 17a is formed to extend so as to surround (see FIG. 4). As shown in FIGS. 6 and 7, the protrusion 18 has a mountain shape whose cross section has a downward slope from the apex to the vertical direction so that the edge of the through-hole 16a can get over from both the vertical direction. ing.

  Further, as shown in FIG. 7, a washer 19 as a retaining means having an outer diameter larger than the lateral width of the through long hole 16a is inserted into the through long hole 16a at the distal end of the lock inserting portion 17. In this state, it is attached with a fastening member 19a such as a bolt. Thereby, when the columnar part 14 is pulled out from the movement restricting chambers 15 </ b> A and 15 </ b> B and the angle adjusting member 11 moves in a direction away from the sheet part 3, the washer 19 hits the upper surface of the lock plate part 16. Therefore, the movement of the angle adjusting member that exceeds the allowable limit in the direction away from the seat portion 3 is prevented, and the angle adjusting member 11 is prevented from falling off.

  8 and 9 show a state in which the movement restriction state in which the columnar portion 14 is fitted in the front movement restriction chamber 15A is released, and FIG. 10 shows that the columnar portion 14 is fitted in the rear movement restriction chamber 15B. The state where the movement of the angle adjusting member 11 is restricted is shown.

  As is clear from these drawings, when the user operating the angle adjusting device 10 puts his hand on the handle 11b (see FIG. 6) provided on the angle adjusting member 11 and pulls it down in the direction away from the seat portion 3, As shown in FIGS. 8 and 9, the projection 18 of the lock insertion portion 17 meshed with the lock plate portion 16 as shown in FIGS. 6 and 7 is elastically deformed and climbs over the edge of the through-hole 16a. The columnar portion 14 is pulled out from the movement restriction chamber 15A, and the movement restriction on the angle adjusting member 11 is released. As a result of the release, the columnar section 14 is guided to the guide path 15C that follows the movement restriction chamber 15A. Since the guide path 15C is connected to the rear movement restricting chamber 15B, the angle adjusting member 11 is guided rearward along the guide path 15C to be guided to the rear movement restricting chamber 15B. In this state, when the user pushes up the angle adjusting member 11 in a direction approaching the seat portion 3, the columnar portion 14 is fitted into the rear movement restricting chamber 15B, and at the same time, the protrusion 18 of the lock insertion portion 17 is elastically deformed. Get over the edge of the through hole 16a and engage with the lock plate 16.

  By such an operation, the angle adjusting member 11 is changed from the front mounting position to the rear mounting position. At the rear mounting position, the movement of the angle adjusting member 11 in the front-rear direction and the left-right direction of the angle adjusting member 11 is restricted by the movement restricting mechanism 12, and the restricted state is held by the lock mechanism 13. . Changing the attachment position of the angle adjusting member 11 from the rear to the front is also realized by the same operation as described above.

  According to the angle adjusting device 10 described above, the inclination of the seat portion 3 can be adjusted in two stages by changing the mounting position of the angle adjusting member 11 in the front-rear direction of the seat portion 3. Since the contact surface 11a of the angle adjusting member 11 extends in the front-rear direction and the left-right direction of the seat portion 3, the contact area with the seat surface 100a of the seat 100 increases. Therefore, the child seat 1 can be stably installed on the seat 100 without applying an excessive burden on the angle adjusting member 11. In addition, the angle adjusting member 11 functions like a wedge by being configured such that the height in the vertical direction gradually decreases toward the rear of the seat portion 3. Therefore, the change in the inclination of the sheet portion 3 with respect to the movement of the angle adjusting member 11 can be made larger than when the height is uniform. The angle adjusting member 11 is installed in the seat 100 because the movement of the seat portion 3 in the front-rear and left-right directions is restricted by the movement restricting mechanism 12 and the restricted state is held by the lock mechanism 13 at each attachment position. The stability of the child seat 1 can be improved. Since the movement restricting mechanism 12 includes a guide path 15C that connects the two movement restricting chambers 15A and 15B, the columnar portion 14 smoothly moves between the two movement restricting chambers 15A and 15B when the mounting position of the angle adjusting member 11 is changed. Can move to. Therefore, the attachment position of the angle adjustment member 11 can be changed quickly.

  Next, the configuration of the rear side of the child seat 1 will be described with reference to FIGS. 11 and 12. FIG. 11 is an enlarged side view in which a part of the child seat 1 shown in FIG. 1 is enlarged, and FIG. 12 is a view showing a state seen from the direction of arrow XII in FIG. In general, there are cases where the lower part of the backrest is inflated for the purpose of fitting the seat to the occupant's waist and buttocks. When a child seat is installed in such a seat, the swelling of the backrest becomes a factor that deteriorates the adhesion of the back surface of the back portion of the child seat. Therefore, in order to accurately correspond the child seat 1 to such a seat, as shown in FIGS. 11 and 12, the seat body 2 is formed with a recess 20 positioned at the boundary between the seat portion 3 and the back portion 4. ing. The concave portion 20 is configured to be recessed from the position of the intersection X1 between the straight line L1 extending along the lower surface 30 of the seat portion 3 and the straight line L2 extending along the back surface 40 of the back portion 4.

  The recess 20 has a pair of left and right inclined surfaces 21 extending while tilting forward of the seat portion 3 following the back surface 40 of the back portion 4, and a pair of left and right upright surfaces 22 following the inclined surface 21. Their boundaries are formed in a curved surface so that the inclined surface 21 and the back surface 40 continue smoothly. As shown in FIG. 11, the upright surface 22 extends toward the end point P located behind the seat portion 3 from the position of the intersection point X2 between the straight line L3 extending along the inclined surface 21 and the straight line L1 described above. In the illustrated form, the upright surface 22 is substantially orthogonal to the lower surface 30 of the seat portion 3. Moreover, the recessed part 20 is comprised by the curved-surface boundary between these surfaces 21 and 22 so that the inclined surface 21 and the upright surface 22 may follow smoothly.

  According to the recess 20 described above, the back 40 of the back portion 4 can be easily brought into close contact with the back of the seat while avoiding the above-described swelling of the back of the seat or along the swelling. And since the recessed part 20 has the upright surface 22 following the inclined surface 21, compared with the form which extends the inclined surface 21 to the lower surface 30 of the sheet | seat part 3 as it is, the area reduction amount of the lower surface 30 of the sheet | seat part 3 is reduced. Less. Thereby, since the contact area of the lower surface 30 of the seat part 3 and the seat surface of a seat can fully be ensured, the stability of the child seat 1 installed in the seat improves. Further, as shown in FIG. 11, the end point P of the upright surface 23 is located behind the center of gravity G of the seat body 2. For this reason, even when the child seat 1 is placed on a horizontal surface such as a floor for installation work or storage on the seat, the child seat 1 does not fall backward centering on the end point P, so that the installation work and storage are easy. There is.

  As shown in FIGS. 11 and 12, the seat body 2 is provided with a pair of relief portions 23 on both the left and right sides of the rear end portion 31 of the seat portion 3. The escape portion 23 is recessed inward in the left-right direction, and the edge portion 23a is formed in an arc shape centering on the intersection X1 in FIG. When the child seat 1 is installed in a vehicle seat, the position of the rear end portion 31 of the seat portion 3 often overlaps the buckle of the vehicle seat belt. Since the escape portion 23 is recessed inside the seat portion 3 in the left-right direction, interference with the buckle can be avoided. The buckle of the seat belt is often designed to be able to rotate in the vertical direction around the boundary between the seat surface and the backrest of the seat, that is, the vicinity of the intersection X1, but the edge 23a of the escape portion 23 is the intersection X. Therefore, it is possible to limit the expansion of the interference range accompanying the rotation of the buckle.

  This invention is not limited to the above form, It can implement with a various form within the range of the summary of this invention. The angle adjusting device 10 described above is merely an example, and the illustrated angle adjusting member 11, the movement restricting mechanism 12, and the lock mechanism 13 may be changed to other forms. The angle adjustment member 11 is configured so that its attachment position can be changed in two stages. For example, the number of the movement restriction chambers of the movement restriction mechanism described above is changed to three or more so that it can be changed in three or more stages. May be implemented. Moreover, it is not essential to change the attachment position of the angle adjusting member step by step, and the present invention can also be implemented in a form that can change the attachment position steplessly.

  Further, it is not essential to provide the movement restricting mechanism and the lock mechanism on the left and right sides, and these can be provided one by one or at a plurality of arbitrary positions. The protruding portion may be a rectangular column such as a rectangular column like the columnar portion 14, or may be a cylinder or an elliptical column having no corners. However, when the protrusion is implemented in a form having a non-circular cross section such as a rectangular column or an elliptical cylinder, the protrusion is fitted into the movement restriction chamber that matches the shape of the protrusion. Even if it is this protrusion part, there exists an advantage which can prevent rotation of the angle adjustment member around the centerline extended in a protrusion direction.

The perspective view which showed the child seat which concerns on one form of this invention. The side view of the child seat of FIG. The side view which showed the state which changed the attitude | position of the child seat of FIG. The expansion perspective view which showed the detail of the angle adjustment member removed from the sheet | seat part. The expanded sectional view along the VV line of FIG. The expanded sectional view along the VI-VI line of FIG. The expansion perspective view which showed the state which looked at a part of sheet | seat part from upper direction. It is the expanded sectional view along the VV line of FIG. 1, Comprising: The figure which showed a mode that the movement control state which the columnar part was fitted in the front movement control chamber was cancelled | released. It is an expanded sectional view along the VI-VI line of FIG. 1, Comprising: The figure which showed a mode that the movement control state which the columnar part was fitted in the front movement control chamber was cancelled | released. The figure which showed the state by which the columnar part was engage | inserted in the back movement control chamber, and the movement of the angle adjustment member was controlled. The enlarged side view which expanded a part of child seat shown in FIG. The figure which showed the state seen from the direction of arrow XII of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Child seat 3 Seat part 4 Back part 11 Angle adjustment member 12 Movement control mechanism 13 Lock mechanism 14 Columnar part (protrusion part)
15A, 15B Movement restriction room (movement restriction part)
15C guideway (guide section)
16 Lock plate portion 16a Through long hole 17 Lock insertion portion 18 Protrusion 19 Washer (Retaining means)
100 seat 100a seat surface 100b backrest

Claims (4)

A child seat comprising a seat portion and a back portion, wherein the seat portion is located on a seating surface of a seat provided in a vehicle and can be installed on the seat in a state where the back portion is in contact with a backrest of the seat.
Has a contact surface in contact with the seat surface of the seat extends in the longitudinal direction and the lateral direction of the seat, is the attachment position of the front Symbol seat mounted on the seat portion in a state that can be changed with respect to the longitudinal direction And an angle adjusting member configured such that the height in the vertical direction gradually decreases toward the rear of the seat portion, and the front-rear direction and the left-right direction at different positions of the seat portion with respect to the front-rear direction. A movement restricting mechanism capable of restricting movement of the angle adjusting member, and a lock mechanism capable of maintaining a state in which movement of the angle adjusting member is restricted by the movement restricting mechanism,
The movement restricting mechanism includes a protrusion that extends upward from the opposite side of the contact surface of the angle adjusting member, and a plurality of movement restricting portions that are provided at different positions of the seat portion in the front-rear direction and into which the protrusion is fitted And extending so as to connect two adjacent movement restricting portions of the plurality of movement restricting portions, and moving the protruding portion removed from one movement restricting portion to the other A child seat comprising: a guide unit capable of guiding to the regulation unit . The protrusion is configured in a column shape having a non-circular cross section, and each of the plurality of movement restricting portions has an internal space having a cross section corresponding to the cross section of the protrusion. The child seat according to claim 1 . The lock mechanism is provided in the seat portion and extends in the front-rear direction and has a lock plate portion formed therethrough, and extends upward from the opposite side of the contact surface of the angle adjustment member. When inserted into the through long hole so as to be movable in the front-rear direction, and when the movement of the angle adjusting member is restricted by the movement restricting mechanism, the edge of the through long hole is overcome and the lock plate part the child seat according to claim 1 or 2, and the lock insertion portion projections are formed, characterized in that it comprises a meshing. Claim 1, characterized in that the when the by the movement restriction mechanism restricting is solved, further comprising retaining means can prevent movement beyond the allowable limit of the angle adjusting member in a direction away from said seat portion the child seat according to one wherein one to three of the.

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